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hv: hypercall: return 0 for empty PX or CX tables 

Avoid failing hypercalls by returning 0 for empty PX and CX tables on
HC_PM_GET_CPU_STATE/PMCMD_GET_PX_CNT and
HC_PM_GET_CPU_STATE/PMCMD_GET_CX_CNT.

Tracked-On: #6848

Signed-off-by: Helmut Buchsbaum <helmut.buchsbaum@opensource.tttech-industrial.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
Acked-by: Eddie Dong <eddie.dong@Intel.com>
This commit is contained in:
Helmut Buchsbaum 2020-09-25 08:56:11 +02:00 committed by wenlingz
parent e97b171ca2
commit 2f54a1862e
1 changed files with 2 additions and 6 deletions
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8
hypervisor/common/hypercall.c
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@ -1096,9 +1096,7 @@ int32_t hcall_get_cpu_pm_state(struct acrn_vcpu *vcpu, struct acrn_vm *target_vm
if (is_created_vm(target_vm)) {
switch (cmd & PMCMD_TYPE_MASK) {
case ACRN_PMCMD_GET_PX_CNT: {
if (target_vm->pm.px_cnt != 0U) {
ret = copy_to_gpa(vm, &(target_vm->pm.px_cnt), param2, sizeof(target_vm->pm.px_cnt));
}
ret = copy_to_gpa(vm, &(target_vm->pm.px_cnt), param2, sizeof(target_vm->pm.px_cnt));
break;
}
case ACRN_PMCMD_GET_PX_DATA: {
@ -1123,9 +1121,7 @@ int32_t hcall_get_cpu_pm_state(struct acrn_vcpu *vcpu, struct acrn_vm *target_vm
break;
}
case ACRN_PMCMD_GET_CX_CNT: {
if (target_vm->pm.cx_cnt != 0U) {
ret = copy_to_gpa(vm, &(target_vm->pm.cx_cnt), param2, sizeof(target_vm->pm.cx_cnt));
}
ret = copy_to_gpa(vm, &(target_vm->pm.cx_cnt), param2, sizeof(target_vm->pm.cx_cnt));
break;
}
case ACRN_PMCMD_GET_CX_DATA: {